Seiko Cal. 3860 - 658

The 3860-658 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3860 caliber with 29j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-d45cb6ae2dae]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1998

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